Zoology Chapter 1 Flashcards
The two major groups of vertebrates are distinguished how?
Based on the innovation of embryonic development. Three membranes formed by tissues that come from embryo
What surrounds the embryo?
Amnion
Animals with amnions are known as?
Aminotes
The division between non aminotes and amniotes corresponds roughly to what?
Aquatic and terrestrial vertebrates
The amniotes are categorized into what two major lineages?
Sauropsids and Synapsids
What animals are included in the Sauropsids?
Reptiles, Including birds
What animals are included in the Synapsids?
Mammals
The lineages, Sauropsids and Synapsids, separated from each other when/
Late Devonian period
Sauropsids and Synapsids represent parallel, but independent origins based on what?
Basic characters such as lung ventilation, kidney function,insulation, and temperature regulation
What are the embryos of non amniotes enclosed and protected by?
The reproductive tract of the female
What animals are included in the Non Amniotes?
Fishes and amphibians
What are the main categories of the Non Amniotes?
Hagfish and Lamprey
Sharks, Rays, Ratfishes
Bony Fishes
Salamanders, Frogs, Caecillians
The Chondrichthyes are?
Sharks, Rays, Ratfishes
The Osteichthyes are?
Bony Fishes
The Urodela, Anura, and Gymnophiona are?
Salamanders, Frogs, Caecillians
Main physical appearance of Lampreys and Hagfish
Elongate, limbless, scaleless, slimy, no internal bony tissues, lack jaws
Habitat of Lampreys and Hagfish
Marine. Seabed at depth of 100 meters or more
Characteristics of Lampreys and Hagfish
Scavengers, parasites
Traditionally grouped as agnathans or cyclostomes
Lampreys and Hagfish
Neoselachii are what?
And are differed from how?
Extant sharks and rays.
Body form and habits
The habitat of Rays are where?
Bottom feeders
Physical appearance of Rays
Dorsoventrally flattened and swim with undulations of their extremely broad pectoral fins.
Rtfishes are get their name how?
From single gill cover that extends over all four gill openings.
Physical appearance of Ratfish
Long,slender tails, bucktooth faces that look like rabbits.
Habitat of Ratfish
Seafloor and feed on had-shelled prey like crustaceans and mollusks